Dry Mouth and Tooth Decay

Dry mouth is a common condition that can affect people of all ages. It occurs when the mouth does not produce enough saliva to keep it moist. While dry mouth may not seem like a big deal, it can have serious consequences for oral health. 

By understanding why dry mouth can cause tooth decay and other dental issues, you can take steps to prevent and treat it. If you are experiencing dry mouth, talk to your dentist or doctor to determine the underlying cause and develop a treatment plan that works for you. With proper care, you can keep your mouth healthy and prevent the dental issues associated with dry mouth

Dry Mouth and Tooth Decay

What Causes Dry Mouth?

There are many different factors that can cause dry mouth.


Many prescription and over-the-counter medications can cause dry mouth as a side effect. For example, some anti-anxiety medications or antihistamines have dry mouth as a potential side effect. If your medication causes dry mouth, you should talk to your primary physician and dentist to hear your options. 


As we age, our bodies produce less saliva, leading to dry mouth. This is partially because our mouths naturally produce less saliva. Additionally, many medical conditions that are common among older people require medications. Unfortunately, this can cause dry mouth.

Lifestyle Factors

Smoking and alcohol use can contribute to dry mouth, as can breathing through your mouth instead of your nose.

Why Does Dry Mouth Cause Tooth Decay?

Saliva is important for maintaining a healthy mouth because it helps to wash away food particles and bacteria. When there is not enough saliva, food particles and bacteria can build up in the mouth, leading to dental issues like tooth decay and gum disease.

Tooth decay occurs when the bacteria in your mouth combine with the sugars and starches in the foods you eat to produce acid. This acid can then eat away at the enamel on your teeth, eventually causing cavities. Saliva helps to neutralize the acid in your mouth, but when there is not enough saliva, the acid can cause more damage to your teeth.

Other Dental Issues Caused by Dry Mouth

In addition to tooth decay, dry mouth can also cause other dental issues.

Bad Breath

When food particles and bacteria are not washed away by saliva, they can lead to bad breath.

Gum Disease

When bacteria build up in the mouth, they can cause inflammation and infection in the gums, leading to gum disease. Unfortunately, this can become a serious problem without proper treatment. 

Mouth Sores

Dry mouth can cause the tissues in the mouth to become irritated and inflamed, leading to painful mouth sores. Unfortunately, this can make it difficult to eat and speak. 

Difficulty Chewing and Swallowing

When the mouth is dry, it can be difficult to chew and swallow food. Over time, this can lead to malnutrition and other health issues. Saliva is actually crucial for digestion. This is because it contains an enzyme that kickstarts the digestive process.